National Instruments USB-443 Series - Page 14

NI USB-443x Calibration Procedure 14 ni.com
5. Initialize the AI calibration using the DAQmx Initialize External Calibration VI as shown below.
Note Refer to the NI-DAQmx function parameters for the LabVIEW input values.
6. Perform the AI calibration adjustment by selecting the DAQmx Adjust DSA AI Calibration VI
from the DAQmx Adjust DSA AI Calibration Polymorphic VI as shown below.
7. Disable the calibrator output.
Table 16. AI Adjustment Configuration for NI USB-443x
Configuration Value
Minimum value –10.0
Maximum value 10.0
Terminal configuration Pseudodifferential
Acquisition mode Continuous
Rate 1000.0
Coupling AC
Physical channel Dev_name/aix
*
*
Dev_name is the name shown for the NI USB-443x in MAX. x refers to the channel number: 0:3 for the
NI USB-4431, and 0:4 for the NI USB-4432.
LabVIEW Block Diagram NI-DAQmx Function Call
Call DAQmxInitExtCal with the following
parameters:
deviceName: Dev_name
password: NI
calHandle: &myCalHandle
LabVIEW Block Diagram NI-DAQmx Function Call
Call DAQmxAdjustDSAAICal with the following
parameters:
calHandle: myCalHandle
referenceVoltage: 6.3
inputsShorted: False